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tpm_tis: Tighten IRQ auto-probing 

auto-probing doesn't work with shared interrupts, and the auto detection
interrupt range is for x86 only.

Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Tested-by: Martin Wilck <Martin.Wilck@ts.fujitsu.com>
Tested-by: Scot Doyle <lkml14@scotdoyle.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Acked-by: Peter Huewe <peterhuewe@gmx.de>
This commit is contained in:
Jason Gunthorpe 2015-11-25 14:05:36 -07:00 committed by Jarkko Sakkinen
parent e3837e74a0
commit b8ba1e7444
1 changed files with 12 additions and 7 deletions
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19
drivers/char/tpm/tpm_tis.c
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@ -603,12 +603,13 @@ static irqreturn_t tis_int_handler(int dummy, void *dev_id)
* irq is seen then leave the chip setup for IRQ operation, otherwise reverse
* everything and leave in polling mode. Returns 0 on success.
*/
static int tpm_tis_probe_irq_single(struct tpm_chip *chip, u32 intmask, int irq)
static int tpm_tis_probe_irq_single(struct tpm_chip *chip, u32 intmask,
int flags, int irq)
{
struct priv_data *priv = chip->vendor.priv;
u8 original_int_vec;
if (devm_request_irq(chip->pdev, irq, tis_int_handler, IRQF_SHARED,
if (devm_request_irq(chip->pdev, irq, tis_int_handler, flags,
chip->devname, chip) != 0) {
dev_info(chip->pdev, "Unable to request irq: %d for probe\n",
irq);
@ -666,10 +667,13 @@ static void tpm_tis_probe_irq(struct tpm_chip *chip, u32 intmask)
TPM_INT_VECTOR(chip->vendor.locality));
if (!original_int_vec) {
for (i = 3; i <= 15; i++)
if (!tpm_tis_probe_irq_single(chip, intmask, i))
return;
} else if (!tpm_tis_probe_irq_single(chip, intmask, original_int_vec))
if (IS_ENABLED(CONFIG_X86))
for (i = 3; i <= 15; i++)
if (!tpm_tis_probe_irq_single(chip, intmask, 0,
i))
return;
} else if (!tpm_tis_probe_irq_single(chip, intmask, 0,
original_int_vec))
return;
}
@ -805,7 +809,8 @@ static int tpm_tis_init(struct device *dev, struct tpm_info *tpm_info,
init_waitqueue_head(&chip->vendor.int_queue);
if (interrupts) {
if (tpm_info->irq) {
tpm_tis_probe_irq_single(chip, intmask, tpm_info->irq);
tpm_tis_probe_irq_single(chip, intmask, IRQF_SHARED,
tpm_info->irq);
if (!chip->vendor.irq)
dev_err(chip->pdev, FW_BUG
"TPM interrupt not working, polling instead\n");