Hi,
I have a module (device driver) that creates an entry in the /proc
file system to record information about the hardware that was found when the
driver initialised. Then later a startup script reads the /proc entry and
uses the information to load each card with firmware. This has all worked
fine for 2.2.x Kernels up to 2.2.21 and still works fine with the latest
2.4.x Kernel, however things seem to have gone awry in 2.2.22 and 2.2.23.
This is what the /proc entry contains:
kevinc@doctor:~/tmp$ more /proc/fsx25
4 cards installed
fsx0: FarSync T1U irq=11 mem=0xF4000000,0x1000,0xF4400000 reset
NCB users 0
fsx1: FarSync T2U irq=3 mem=0xF4100000,0x1400,0xF4400800 reset
NCB users 0
fsx2: FarSync T2P irq=10 mem=0xF4200000,0x1C00,0xF4401000 reset
NCB users 0
fsx3: FarSync T4P irq=9 mem=0xF4300000,0x2800,0xF4401800 reset
NCB users 0
This is a minimised script that reads the /proc entry
kevinc@doctor:~/tmp$ more test
count=0
# Read in the card status list and process each card in turn
while read label series card irq mem state
do
echo "line $count $label $series $card $irq $mem $state"
count=`expr $count + 1`
done < /proc/fsx25
and this is the output I get
kevinc@doctor:~/tmp$ ./test
line 0 4 cards installed
line 1 mem=0xF4100000,0x1400,0xF4400800 NCB access OK
line 2 OK
If I copy /proc/fsx25 to /tmp/fsx25 and modify the script to get input from
/tmp/fsx25 I get
kevinc@doctor:~/tmp$ ./test
line 0 4 cards installed
line 1
line 2 fsx0: FarSync T1U irq=11 mem=0xF4000000,0x1000,0xF4400000 reset
line 3 NCB users 0
line 4 fsx1: FarSync T2U irq=3 mem=0xF4100000,0x1400,0xF4400800 reset
line 5 NCB users 0
line 6 fsx2: FarSync T2P irq=10 mem=0xF4200000,0x1C00,0xF4401000 reset
line 7 NCB users 0
line 8 fsx3: FarSync T4P irq=9 mem=0xF4300000,0x2800,0xF4401800 reset
line 9 NCB users 0
Anybody got any idea what has changed here?
Kevin
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This archive was generated by hypermail 2b29 : Sat Feb 15 2003 - 22:00:26 EST