https://github.com/torvalds/linux
Revision aafa9f958342db36c17ac2a7f1b841032c96feb4 authored by Zheyu Ma on 21 April 2022, 01:39:20 UTC, committed by Damien Le Moal on 21 April 2022, 23:45:06 UTC
Before detecting the cable type on the dma bar, the driver should check
whether the 'bmdma_addr' is zero, which means the adapter does not
support DMA, otherwise we will get the following error:

[    5.146634] Bad IO access at port 0x1 (return inb(port))
[    5.147206] WARNING: CPU: 2 PID: 303 at lib/iomap.c:44 ioread8+0x4a/0x60
[    5.150856] RIP: 0010:ioread8+0x4a/0x60
[    5.160238] Call Trace:
[    5.160470]  <TASK>
[    5.160674]  marvell_cable_detect+0x6e/0xc0 [pata_marvell]
[    5.161728]  ata_eh_recover+0x3520/0x6cc0
[    5.168075]  ata_do_eh+0x49/0x3c0

Signed-off-by: Zheyu Ma <zheyuma97@gmail.com>
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
1 parent 55b0141
History
Tip revision: aafa9f958342db36c17ac2a7f1b841032c96feb4 authored by Zheyu Ma on 21 April 2022, 01:39:20 UTC
ata: pata_marvell: Check the 'bmdma_addr' beforing reading
Tip revision: aafa9f9
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