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misc/93xx46: avoid infinite loop on write() 

This change fixes a problem of infinite zero byte write() without
an error status, if there is an attempt to write a file bigger than
EEPROM size over sysfs interface.

Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Vladimir Zapolskiy 2013-10-28 19:05:16 +02:00 committed by Greg Kroah-Hartman
parent 5c6d6fd156
commit 95f774c526
1 changed files with 1 additions and 1 deletions
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2
drivers/misc/eeprom/eeprom_93xx46.c
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@ -202,7 +202,7 @@ eeprom_93xx46_bin_write(struct file *filp, struct kobject *kobj,
edev = dev_get_drvdata(dev);
if (unlikely(off >= edev->bin.size))
return 0;
return -EFBIG;
if ((off + count) > edev->bin.size)
count = edev->bin.size - off;
if (unlikely(!count))