amd flash problem

amd flash problem

[Pichai Raghavan]

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Hi All,

I am using the 2.4.2 MTD driver code on my board that has AMD
flash. I am noticing a bug in the write code. AMD flash driver
makes use of unlock bypass mode for doing bulk write; when 
issuing
the start and end of the unlock bypass commands;it does not 
check
if the flash state is READY.(function cfi_amdstd_write() in
cfi_cmdset_0002.c) In the meanwhile if the flash driver is doing
an erase or write in the context of another process and has got
scheduled out, then the flash gets into a unknown state.

This seems to be causing a problem when write to multiple
partitions are written. Has this problem been fixed in later
kernels? (Had a glance at 2.4.17 code and there also the same 
code
is there)

Thanks
Raghav



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Subject: AMD CFI driver problem
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Hi All,

I am using the 2.4.2 MTD driver code on my board that has AMD 
flash. I am noticing a bug in the write code. AMD flash driver 
makes use of unlock bypass mode for doing bulk write; when issuing 
the start and end of the unlock bypass commands;it does not check 
if the flash state is READY.(function cfi_amdstd_write() in 
cfi_cmdset_0002.c) In the meanwhile if the flash driver is doing 
an erase or write in the context of another process and has got 
scheduled out, then the flash gets into a unknown state.

This seems to be causing a problem when write to multiple 
partitions are written. Has this problem been fixed in later 
kernels? (Had a glance at 2.4.17 code and there also the same code 
is there)

Thanks
Raghav