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| author | Zheyu Ma <zheyuma97@gmail.com> | 2022-04-21 03:39:20 +0200 |
|---|---|---|
| committer | Damien Le Moal <damien.lemoal@opensource.wdc.com> | 2022-04-22 01:45:06 +0200 |
| commit | aafa9f958342db36c17ac2a7f1b841032c96feb4 (patch) | |
| tree | bdab752e1aa0aa99234944f0ca8fb2e7da9f34d6 /drivers | |
| parent | ata: ahci: Rename CONFIG_SATA_LPM_POLICY configuration item back (diff) | |
| download | linux-aafa9f958342db36c17ac2a7f1b841032c96feb4.tar.xz linux-aafa9f958342db36c17ac2a7f1b841032c96feb4.zip | |
ata: pata_marvell: Check the 'bmdma_addr' beforing reading
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/ata/pata_marvell.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/ata/pata_marvell.c b/drivers/ata/pata_marvell.c index 0c5a51970fbf..014ccb0f45dc 100644 --- a/drivers/ata/pata_marvell.c +++ b/drivers/ata/pata_marvell.c @@ -77,6 +77,8 @@ static int marvell_cable_detect(struct ata_port *ap) switch(ap->port_no) { case 0: + if (!ap->ioaddr.bmdma_addr) + return ATA_CBL_PATA_UNK; if (ioread8(ap->ioaddr.bmdma_addr + 1) & 1) return ATA_CBL_PATA40; return ATA_CBL_PATA80; |