[3.13.y-ckt stable] Patch "tpm/tpm_i2c_stm_st33: Add status check when reading data on the FIFO" has been added to staging queue
Kamal Mostafa
kamal at canonical.com
Tue Mar 31 18:45:29 UTC 2015
This is a note to let you know that I have just added a patch titled
tpm/tpm_i2c_stm_st33: Add status check when reading data on the FIFO
to the linux-3.13.y-queue branch of the 3.13.y-ckt extended stable tree
which can be found at:
http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.13.y-queue
This patch is scheduled to be released in version 3.13.11-ckt18.
If you, or anyone else, feels it should not be added to this tree, please
reply to this email.
For more information about the 3.13.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable
Thanks.
-Kamal
------
>From 1119771821a5f401ae392a94fa36b387da2cb728 Mon Sep 17 00:00:00 2001
From: Christophe Ricard <christophe.ricard at gmail.com>
Date: Tue, 13 Jan 2015 23:13:14 +0100
Subject: tpm/tpm_i2c_stm_st33: Add status check when reading data on the FIFO
commit c4eadfafb91d5501095c55ffadaa1168743f39d3 upstream.
Add a return value check when reading data from the FIFO register.
Reviewed-by: Jason Gunthorpe <jason.gunthorpe at obsidianresearch.com>
Signed-off-by: Christophe Ricard <christophe-h.ricard at st.com>
Reviewed-by: Peter Huewe <peterhuewe at gmx.de>
Signed-off-by: Peter Huewe <peterhuewe at gmx.de>
[ luis: backported to 3.16: adjusted context ]
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
drivers/char/tpm/tpm_i2c_stm_st33.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/char/tpm/tpm_i2c_stm_st33.c b/drivers/char/tpm/tpm_i2c_stm_st33.c
index 2a95ca3..0fa5a16 100644
--- a/drivers/char/tpm/tpm_i2c_stm_st33.c
+++ b/drivers/char/tpm/tpm_i2c_stm_st33.c
@@ -398,7 +398,7 @@ static int wait_for_stat(struct tpm_chip *chip, u8 mask, unsigned long timeout,
*/
static int recv_data(struct tpm_chip *chip, u8 *buf, size_t count)
{
- int size = 0, burstcnt, len;
+ int size = 0, burstcnt, len, ret;
struct i2c_client *client;
client = (struct i2c_client *)TPM_VPRIV(chip);
@@ -413,7 +413,10 @@ static int recv_data(struct tpm_chip *chip, u8 *buf, size_t count)
if (burstcnt < 0)
return burstcnt;
len = min_t(int, burstcnt, count - size);
- I2C_READ_DATA(client, TPM_DATA_FIFO, buf + size, len);
+ ret = I2C_READ_DATA(client, TPM_DATA_FIFO, buf + size, len);
+ if (ret < 0)
+ return ret;
+
size += len;
}
return size;
--
1.9.1
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