From: Jarkko Sakkinen Date: Fri, 9 May 2014 11:23:10 +0000 (+0300) Subject: tpm: missing tpm_chip_put in tpm_get_random() X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=3e14d83ef94a5806a865b85b513b4e891923c19b;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git tpm: missing tpm_chip_put in tpm_get_random() Regression in 41ab999c. Call to tpm_chip_put is missing. This will cause TPM device driver not to unload if tmp_get_random() is called. Cc: # 3.7+ Signed-off-by: Jarkko Sakkinen Signed-off-by: Peter Huewe --- diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c index d175fb8e719a..bef6cceffc3a 100644 --- a/drivers/char/tpm/tpm-interface.c +++ b/drivers/char/tpm/tpm-interface.c @@ -991,13 +991,13 @@ int tpm_get_random(u32 chip_num, u8 *out, size_t max) int err, total = 0, retries = 5; u8 *dest = out; + if (!out || !num_bytes || max > TPM_MAX_RNG_DATA) + return -EINVAL; + chip = tpm_chip_find_get(chip_num); if (chip == NULL) return -ENODEV; - if (!out || !num_bytes || max > TPM_MAX_RNG_DATA) - return -EINVAL; - do { tpm_cmd.header.in = tpm_getrandom_header; tpm_cmd.params.getrandom_in.num_bytes = cpu_to_be32(num_bytes); @@ -1016,6 +1016,7 @@ int tpm_get_random(u32 chip_num, u8 *out, size_t max) num_bytes -= recd; } while (retries-- && total < max); + tpm_chip_put(chip); return total ? total : -EIO; } EXPORT_SYMBOL_GPL(tpm_get_random);