This patch puts in the missing up call on the tpm_mutex on an error condition in the tpm_transmit function. Bug reported by Stefan Berger <[EMAIL PROTECTED]>. This patch also implements a new status function to handle future chip configurations which may generate status differntly.
Thanks, Kylie Signed-off-by: Kylene Hall <[EMAIL PROTECTED]> --- diff -uprN linux-2.6.10/drivers/char/tpm/tpm_atmel.c linux-2.6.10-tpm/drivers/char/tpm/tpm_atmel.c --- linux-2.6.10/drivers/char/tpm/tpm_atmel.c 2005-01-18 16:42:17.000000000 -0600 +++ linux-2.6.10-tpm/drivers/char/tpm/tpm_atmel.c 2005-01-21 13:11:11.000000000 -0600 @@ -112,6 +112,11 @@ static void tpm_atml_cancel(struct tpm_c outb(ATML_STATUS_ABORT, chip->vendor->base + 1); } +static u8 tpm_atml_status(struct tpm_chip *chip) +{ + return inb( chip->vendor->base + 1); +} + static struct file_operations atmel_ops = { .owner = THIS_MODULE, .llseek = no_llseek, @@ -125,6 +130,7 @@ static struct tpm_vendor_specific tpm_at .recv = tpm_atml_recv, .send = tpm_atml_send, .cancel = tpm_atml_cancel, + .status = tpm_atml_status, .req_complete_mask = ATML_STATUS_BUSY | ATML_STATUS_DATA_AVAIL, .req_complete_val = ATML_STATUS_DATA_AVAIL, .base = TPM_ATML_BASE, diff -uprN linux-2.6.10/drivers/char/tpm/tpm.c linux-2.6.10-tpm/drivers/char/tpm/tpm.c --- linux-2.6.10/drivers/char/tpm/tpm.c 2005-01-21 12:53:26.000000000 -0600 +++ linux-2.6.10-tpm/drivers/char/tpm/tpm.c 2005-01-28 16:28:45.578493680 -0600 @@ -152,6 +151,7 @@ static ssize_t tpm_transmit(struct tpm_c if ((len = chip->vendor->send(chip, (u8 *) buf, count)) < 0) { dev_err(&chip->pci_dev->dev, "tpm_transmit: tpm_send: error %d\n", len); + up(&chip->tpm_mutex); return len; } @@ -165,7 +165,7 @@ static ssize_t tpm_transmit(struct tpm_c up(&chip->timer_manipulation_mutex); do { - u8 status = inb(chip->vendor->base + 1); + u8 status = chip->vendor->status(chip); if ((status & chip->vendor->req_complete_mask) == chip->vendor->req_complete_val) { down(&chip->timer_manipulation_mutex); diff -uprN linux-2.6.10/drivers/char/tpm/tpm.h linux-2.6.10-tpm/drivers/char/tpm/tpm.h --- linux-2.6.10/drivers/char/tpm/tpm.h 2005-01-18 16:42:17.000000000 -0600 +++ linux-2.6.10-tpm/drivers/char/tpm/tpm.h 2005-01-21 13:10:20.000000000 -0600 @@ -40,6 +40,7 @@ struct tpm_vendor_specific { int (*recv) (struct tpm_chip *, u8 *, size_t); int (*send) (struct tpm_chip *, u8 *, size_t); void (*cancel) (struct tpm_chip *); + u8 (*status) (struct tpm_chip *); struct miscdevice miscdev; }; diff -uprN linux-2.6.10/drivers/char/tpm/tpm_nsc.c linux-2.6.10-tpm/drivers/char/tpm/tpm_nsc.c --- linux-2.6.10/drivers/char/tpm/tpm_nsc.c 2005-01-18 16:42:17.000000000 -0600 +++ linux-2.6.10-tpm/drivers/char/tpm/tpm_nsc.c 2005-01-21 13:12:27.000000000 -0600 @@ -219,6 +219,12 @@ static void tpm_nsc_cancel(struct tpm_ch outb(NSC_COMMAND_CANCEL, chip->vendor->base + NSC_COMMAND); } + +static u8 tpm_nsc_status(struct tpm_chip *chip) +{ + return inb(chip->vendor->base + NSC_STATUS); +} + static struct file_operations nsc_ops = { .owner = THIS_MODULE, .llseek = no_llseek, @@ -232,6 +238,7 @@ static struct tpm_vendor_specific tpm_ns .recv = tpm_nsc_recv, .send = tpm_nsc_send, .cancel = tpm_nsc_cancel, + .status = tpm_nsc_status, .req_complete_mask = NSC_STATUS_OBF, .req_complete_val = NSC_STATUS_OBF, .base = TPM_NSC_BASE, - 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/