From: Bartlomiej Zolnierkiewicz Subject: [PATCH] ide: fix probing for hosts with serialized or IRQ sharing interfaces After hwif_register_devices() IDE devices are ready to be used so the way in which ide_device_add() works currently is racy for hosts with serialized / IRQ sharing interfaces. Fix ide_device_add() by looping over interfaces for probe_hwif(), hwif_init() and hwif_register_devices() operations. Signed-off-by: Bartlomiej Zolnierkiewicz --- drivers/ide/ide-probe.c | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) Index: b/drivers/ide/ide-probe.c =================================================================== --- a/drivers/ide/ide-probe.c +++ b/drivers/ide/ide-probe.c @@ -1389,9 +1389,14 @@ int ide_device_add(u8 idx[4]) if (idx[i] == 0xff) continue; - hwif = &ide_hwifs[idx[i]]; + probe_hwif(&ide_hwifs[idx[i]]); + } - probe_hwif(hwif); + for (i = 0; i < 4; i++) { + if (idx[i] == 0xff) + continue; + + hwif = &ide_hwifs[idx[i]]; if (hwif_init(hwif) == 0) { printk(KERN_INFO "%s: failed to initialize IDE " @@ -1399,6 +1404,13 @@ int ide_device_add(u8 idx[4]) rc = -1; continue; } + } + + for (i = 0; i < 4; i++) { + if (idx[i] == 0xff) + continue; + + hwif = &ide_hwifs[idx[i]]; if (hwif->present) hwif_register_devices(hwif);