Bug in sysfs bin attribute?

[Vikas Chaudhary <vikas.chaudhary@qlogic.com>]

We have added sysfs bin_attribute 'fw_dump' in qla4xxx driver.
Here is patch for same: -
http://marc.info/?l=linux-scsi&m=133733192809849&w=2


In this patch in function qla4_8xxx_sysfs_write_fw_dump() if we print
string coming in 'char *buf'
from sysfs attribute it contain value we echo on sysfs attribute 'fw_dump'
plus some garbage data.


If I write "5" to sysfs attribute I am getting following string in buf : -


May 18 12:08:00 magana kernel: ----------------
May 18 12:08:00 magana kernel: buf: 5
May 18 12:08:00 magana kernel: /../../host10           <-- Garbage data
May 18 12:08:00 magana kernel: ----------------



Because of this garbage data kstrtol() fails in function
qla4_8xxx_sysfs_write_fw_dump().
If we use simple_strtol() instate of kstrtol() it works well. But
simple_strtol() is deprecated
so we can't use this API.
Solution to this, for now are writing "0" at buf[1] as we are interested
only in value at buf[0].


I am interested to know if the behavior of sysfs attribute is correct or
is it an issue?



Thanks,
Vikas.



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