@@ -124,29 +124,23 @@ EXPORT_SYMBOL_GPL(tpm_default_chip);
*/
struct tpm_chip *tpm_find_get_ops(struct tpm_chip *chip)
{
- struct tpm_chip *res = NULL;
- int chip_num = 0;
- int chip_prev;
-
- mutex_lock(&idr_lock);
+ int rc;
- if (!chip) {
- do {
- chip_prev = chip_num;
- chip = idr_get_next(&dev_nums_idr, &chip_num);
- if (chip && !tpm_try_get_ops(chip)) {
- res = chip;
- break;
- }
- } while (chip_prev != chip_num);
- } else {
+ if (chip) {
if (!tpm_try_get_ops(chip))
- res = chip;
+ return chip;
+ return NULL;
}
- mutex_unlock(&idr_lock);
-
- return res;
+ chip = tpm_default_chip();
+ if (!chip)
+ return NULL;
+ rc = tpm_try_get_ops(chip);
+ /* release additional reference we got from tpm_default_chip() */
+ put_device(&chip->dev);
+ if (!rc)
+ return NULL;
+ return chip;
}
/**
Convert tpm_find_get_ops() to use tpm_default_chip() in case no chip is passed in. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> --- drivers/char/tpm/tpm-chip.c | 32 +++++++++++++------------------- 1 file changed, 13 insertions(+), 19 deletions(-)