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fsi: core: Fix return of error values on failures 

[ Upstream commit 910810945707fe9877ca86a0dca4e585fd05e37b ]

Currently the cfam_read and cfam_write functions return the provided
number of bytes given in the count parameter and not the error return
code in variable rc, hence all failures of read/writes are being
silently ignored. Fix this by returning the error code in rc.

Addresses-Coverity: ("Unused value")
Fixes: d1dcd67825 ("fsi: Add cfam char devices")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Jeremy Kerr <jk@ozlabs.org>
Link: https://lore.kernel.org/r/20210603122812.83587-1-colin.king@canonical.com
Signed-off-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Colin Ian King 2021-06-03 13:28:12 +01:00 committed by Greg Kroah-Hartman
parent aeed300a2e
commit 19c8f5307a
1 changed files with 2 additions and 2 deletions
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4
drivers/fsi/fsi-core.c
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@ -718,7 +718,7 @@ static ssize_t cfam_read(struct file *filep, char __user *buf, size_t count,
rc = count;
fail:
*offset = off;
return count;
return rc;
}
static ssize_t cfam_write(struct file *filep, const char __user *buf,
@ -755,7 +755,7 @@ static ssize_t cfam_write(struct file *filep, const char __user *buf,
rc = count;
fail:
*offset = off;
return count;
return rc;
}
static loff_t cfam_llseek(struct file *file, loff_t offset, int whence)