Re: [PATCH v3] qla2xxx: silence two GCC warnings
On Wed, 2013-01-30 at 08:07 +, Saurav Kashyap wrote: > I am submitting some correction patches today and this patch will be part > of the scsi-misc submission after that set. Thanks. Paul Bolle -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCH v3] qla2xxx: silence two GCC warnings
>On Mon, 2012-10-08 at 11:15 -0500, Saurav Kashyap wrote: >> Acked-by: Saurav Kashyap >> >> Thanks, >> ~Saurav >> >> >Compiling qla_gs.o (part of the qla2xxx module) triggers two GCC >> >warnings: >> >drivers/scsi/qla2xxx/qla_gs.c: In function Œqla2x00_fdmi_rhba¹: >> >drivers/scsi/qla2xxx/qla_gs.c:1339:7: warning: array subscript is >> >above array bounds [-Warray-bounds] >> >drivers/scsi/qla2xxx/qla_gs.c: In function Œqla2x00_fdmi_register¹: >> >drivers/scsi/qla2xxx/qla_gs.c:1663:15: warning: array subscript is >> >above array bounds [-Warray-bounds] > >This patch was originally posted to silence two GCC warnings while >building v3.6-rc7. Basically identical warnings can still be seen while >building v3.8-rc5. What's the status of this patch? Hi Paul, I am submitting some correction patches today and this patch will be part of the scsi-misc submission after that set. Thanks, ~Saurav > > >Paul Bolle > >-- >To unsubscribe from this list: send the line "unsubscribe linux-scsi" in >the body of a message to majord...@vger.kernel.org >More majordomo info at http://vger.kernel.org/majordomo-info.html > This message and any attached documents contain information from QLogic Corporation or its wholly-owned subsidiaries that may be confidential. If you are not the intended recipient, you may not read, copy, distribute, or use this information. If you have received this transmission in error, please notify the sender immediately by reply e-mail and then delete this message.
Re: [PATCH v3] qla2xxx: silence two GCC warnings
On Mon, 2012-10-08 at 11:15 -0500, Saurav Kashyap wrote: > Acked-by: Saurav Kashyap > > Thanks, > ~Saurav > > >Compiling qla_gs.o (part of the qla2xxx module) triggers two GCC > >warnings: > >drivers/scsi/qla2xxx/qla_gs.c: In function Œqla2x00_fdmi_rhba¹: > >drivers/scsi/qla2xxx/qla_gs.c:1339:7: warning: array subscript is > >above array bounds [-Warray-bounds] > >drivers/scsi/qla2xxx/qla_gs.c: In function Œqla2x00_fdmi_register¹: > >drivers/scsi/qla2xxx/qla_gs.c:1663:15: warning: array subscript is > >above array bounds [-Warray-bounds] This patch was originally posted to silence two GCC warnings while building v3.6-rc7. Basically identical warnings can still be seen while building v3.8-rc5. What's the status of this patch? Paul Bolle -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCH v3] qla2xxx: silence two GCC warnings
Acked-by: Saurav Kashyap Thanks, ~Saurav >Compiling qla_gs.o (part of the qla2xxx module) triggers two GCC >warnings: >drivers/scsi/qla2xxx/qla_gs.c: In function Œqla2x00_fdmi_rhba¹: >drivers/scsi/qla2xxx/qla_gs.c:1339:7: warning: array subscript is >above array bounds [-Warray-bounds] >drivers/scsi/qla2xxx/qla_gs.c: In function Œqla2x00_fdmi_register¹: >drivers/scsi/qla2xxx/qla_gs.c:1663:15: warning: array subscript is >above array bounds [-Warray-bounds] > >It seems that the sequence of a strcpy followed by a strlen confuses GCC >when it is keeping track of array bounds here. (It is not clear to me >which array triggers this warning and by how much GCC thinks the >subscript is above its bounds. Neither is it clear to me why comparable >code in these two functions doesn't trigger this warning.) > >An easy way to silence these warnings is to use preprocessor macros and >strncpy, as that apparently gives GCC enough information to keep track >of array bounds. > >Signed-off-by: Paul Bolle >--- >0) Updated for Saurav's request to use strncpy(). > >1) Still only compile tested. > > drivers/scsi/qla2xxx/qla_def.h | 1 + > drivers/scsi/qla2xxx/qla_gs.c | 8 > 2 files changed, 5 insertions(+), 4 deletions(-) > >diff --git a/drivers/scsi/qla2xxx/qla_def.h >b/drivers/scsi/qla2xxx/qla_def.h >index 39007f5..8895038 100644 >--- a/drivers/scsi/qla2xxx/qla_def.h >+++ b/drivers/scsi/qla2xxx/qla_def.h >@@ -37,6 +37,7 @@ > #include "qla_nx.h" > #define QLA2XXX_DRIVER_NAME "qla2xxx" > #define QLA2XXX_APIDEV"ql2xapidev" >+#define QLA2XXX_MANUFACTURER "QLogic Corporation" > > /* > * We have MAILBOX_REGISTER_COUNT sized arrays in a few places, >diff --git a/drivers/scsi/qla2xxx/qla_gs.c b/drivers/scsi/qla2xxx/qla_gs.c >index 05260d2..824cbcf 100644 >--- a/drivers/scsi/qla2xxx/qla_gs.c >+++ b/drivers/scsi/qla2xxx/qla_gs.c >@@ -1325,8 +1325,8 @@ qla2x00_fdmi_rhba(scsi_qla_host_t *vha) > /* Manufacturer. */ > eiter = (struct ct_fdmi_hba_attr *) (entries + size); > eiter->type = __constant_cpu_to_be16(FDMI_HBA_MANUFACTURER); >- strcpy(eiter->a.manufacturer, "QLogic Corporation"); >- alen = strlen(eiter->a.manufacturer); >+ alen = strlen(QLA2XXX_MANUFACTURER); >+ strncpy(eiter->a.manufacturer, QLA2XXX_MANUFACTURER, alen + 1); > alen += (alen & 3) ? (4 - (alen & 3)) : 4; > eiter->len = cpu_to_be16(4 + alen); > size += 4 + alen; >@@ -1646,8 +1646,8 @@ qla2x00_fdmi_rpa(scsi_qla_host_t *vha) > /* OS device name. */ > eiter = (struct ct_fdmi_port_attr *) (entries + size); > eiter->type = __constant_cpu_to_be16(FDMI_PORT_OS_DEVICE_NAME); >- strcpy(eiter->a.os_dev_name, QLA2XXX_DRIVER_NAME); >- alen = strlen(eiter->a.os_dev_name); >+ alen = strlen(QLA2XXX_DRIVER_NAME); >+ strncpy(eiter->a.os_dev_name, QLA2XXX_DRIVER_NAME, alen + 1); > alen += (alen & 3) ? (4 - (alen & 3)) : 4; > eiter->len = cpu_to_be16(4 + alen); > size += 4 + alen; >-- >1.7.11.4 > > This message and any attached documents contain information from QLogic Corporation or its wholly-owned subsidiaries that may be confidential. If you are not the intended recipient, you may not read, copy, distribute, or use this information. If you have received this transmission in error, please notify the sender immediately by reply e-mail and then delete this message. -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
[PATCH v3] qla2xxx: silence two GCC warnings
Compiling qla_gs.o (part of the qla2xxx module) triggers two GCC warnings: drivers/scsi/qla2xxx/qla_gs.c: In function ‘qla2x00_fdmi_rhba’: drivers/scsi/qla2xxx/qla_gs.c:1339:7: warning: array subscript is above array bounds [-Warray-bounds] drivers/scsi/qla2xxx/qla_gs.c: In function ‘qla2x00_fdmi_register’: drivers/scsi/qla2xxx/qla_gs.c:1663:15: warning: array subscript is above array bounds [-Warray-bounds] It seems that the sequence of a strcpy followed by a strlen confuses GCC when it is keeping track of array bounds here. (It is not clear to me which array triggers this warning and by how much GCC thinks the subscript is above its bounds. Neither is it clear to me why comparable code in these two functions doesn't trigger this warning.) An easy way to silence these warnings is to use preprocessor macros and strncpy, as that apparently gives GCC enough information to keep track of array bounds. Signed-off-by: Paul Bolle --- 0) Updated for Saurav's request to use strncpy(). 1) Still only compile tested. drivers/scsi/qla2xxx/qla_def.h | 1 + drivers/scsi/qla2xxx/qla_gs.c | 8 2 files changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h index 39007f5..8895038 100644 --- a/drivers/scsi/qla2xxx/qla_def.h +++ b/drivers/scsi/qla2xxx/qla_def.h @@ -37,6 +37,7 @@ #include "qla_nx.h" #define QLA2XXX_DRIVER_NAME"qla2xxx" #define QLA2XXX_APIDEV "ql2xapidev" +#define QLA2XXX_MANUFACTURER "QLogic Corporation" /* * We have MAILBOX_REGISTER_COUNT sized arrays in a few places, diff --git a/drivers/scsi/qla2xxx/qla_gs.c b/drivers/scsi/qla2xxx/qla_gs.c index 05260d2..824cbcf 100644 --- a/drivers/scsi/qla2xxx/qla_gs.c +++ b/drivers/scsi/qla2xxx/qla_gs.c @@ -1325,8 +1325,8 @@ qla2x00_fdmi_rhba(scsi_qla_host_t *vha) /* Manufacturer. */ eiter = (struct ct_fdmi_hba_attr *) (entries + size); eiter->type = __constant_cpu_to_be16(FDMI_HBA_MANUFACTURER); - strcpy(eiter->a.manufacturer, "QLogic Corporation"); - alen = strlen(eiter->a.manufacturer); + alen = strlen(QLA2XXX_MANUFACTURER); + strncpy(eiter->a.manufacturer, QLA2XXX_MANUFACTURER, alen + 1); alen += (alen & 3) ? (4 - (alen & 3)) : 4; eiter->len = cpu_to_be16(4 + alen); size += 4 + alen; @@ -1646,8 +1646,8 @@ qla2x00_fdmi_rpa(scsi_qla_host_t *vha) /* OS device name. */ eiter = (struct ct_fdmi_port_attr *) (entries + size); eiter->type = __constant_cpu_to_be16(FDMI_PORT_OS_DEVICE_NAME); - strcpy(eiter->a.os_dev_name, QLA2XXX_DRIVER_NAME); - alen = strlen(eiter->a.os_dev_name); + alen = strlen(QLA2XXX_DRIVER_NAME); + strncpy(eiter->a.os_dev_name, QLA2XXX_DRIVER_NAME, alen + 1); alen += (alen & 3) ? (4 - (alen & 3)) : 4; eiter->len = cpu_to_be16(4 + alen); size += 4 + alen; -- 1.7.11.4 -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
