3.16.7-ckt16 -stable review patch. If anyone has any objections, please let me know.
------------------ From: Michal Nazarewicz <[email protected]> commit 8515bac01a983d277148e4fcc5f235bf603de577 upstream. Mass storage function created via configfs always reports eight LUNs to the hosts even if only one LUN has been configured. Adjust the number when the USB function is allocated based on LUNs that user has created. Tested-by: Gregory CLEMENT <[email protected]> Signed-off-by: Michal Nazarewicz <[email protected]> Signed-off-by: Felipe Balbi <[email protected]> [ luis: backported to 3.16: - file rename: drivers/usb/gadget/function/f_mass_storage.c -> drivers/usb/gadget/f_mass_storage.c ] Signed-off-by: Luis Henriques <[email protected]> --- drivers/usb/gadget/f_mass_storage.c | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-) diff --git a/drivers/usb/gadget/f_mass_storage.c b/drivers/usb/gadget/f_mass_storage.c index b96393908860..53f4d4a868b5 100644 --- a/drivers/usb/gadget/f_mass_storage.c +++ b/drivers/usb/gadget/f_mass_storage.c @@ -2819,7 +2819,7 @@ int fsg_common_set_nluns(struct fsg_common *common, int nluns) return -EINVAL; } - curlun = kcalloc(nluns, sizeof(*curlun), GFP_KERNEL); + curlun = kcalloc(FSG_MAX_LUNS, sizeof(*curlun), GFP_KERNEL); if (unlikely(!curlun)) return -ENOMEM; @@ -2829,8 +2829,6 @@ int fsg_common_set_nluns(struct fsg_common *common, int nluns) common->luns = curlun; common->nluns = nluns; - pr_info("Number of LUNs=%d\n", common->nluns); - return 0; } EXPORT_SYMBOL_GPL(fsg_common_set_nluns); @@ -3604,14 +3602,26 @@ static struct usb_function *fsg_alloc(struct usb_function_instance *fi) struct fsg_opts *opts = fsg_opts_from_func_inst(fi); struct fsg_common *common = opts->common; struct fsg_dev *fsg; + unsigned nluns, i; fsg = kzalloc(sizeof(*fsg), GFP_KERNEL); if (unlikely(!fsg)) return ERR_PTR(-ENOMEM); mutex_lock(&opts->lock); + if (!opts->refcnt) { + for (nluns = i = 0; i < FSG_MAX_LUNS; ++i) + if (common->luns[i]) + nluns = i + 1; + if (!nluns) + pr_warn("No LUNS defined, continuing anyway\n"); + else + common->nluns = nluns; + pr_info("Number of LUNs=%u\n", common->nluns); + } opts->refcnt++; mutex_unlock(&opts->lock); + fsg->function.name = FSG_DRIVER_DESC; fsg->function.bind = fsg_bind; fsg->function.unbind = fsg_unbind; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
