IDE PIO calculates size wrong. Proven by test on MIPS Malta platform with multiple CPU types with bootparam flag "ide-core.nodma=0.0". It is still needed to test non-DMA IO. Change-Id: Id82c2bc5965d85960846db53d84846d9a05d75a3 Author: Leonid Yegoshin <yegoshin@xxxxxxxx> Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@xxxxxxxxxx> (imported from commit 43cee988ce0aa8d2ca1eec014d25f014e95eefe6) (imported from commit d74805b8b12cada05df811e112eb7e3ec197d565) --- drivers/ide/ide-taskfile.c | 5 ++--- 1 files changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/ide/ide-taskfile.c b/drivers/ide/ide-taskfile.c index 729428e..dabb88b 100644 --- a/drivers/ide/ide-taskfile.c +++ b/drivers/ide/ide-taskfile.c @@ -239,9 +239,6 @@ void ide_pio_bytes(ide_drive_t *drive, struct ide_cmd *cmd, unsigned nr_bytes = min(len, cursg->length - cmd->cursg_ofs); int page_is_high; - if (nr_bytes > PAGE_SIZE) - nr_bytes = PAGE_SIZE; - page = sg_page(cursg); offset = cursg->offset + cmd->cursg_ofs; @@ -249,6 +246,8 @@ void ide_pio_bytes(ide_drive_t *drive, struct ide_cmd *cmd, page = nth_page(page, (offset >> PAGE_SHIFT)); offset %= PAGE_SIZE; + nr_bytes = min_t(unsigned, nr_bytes, (PAGE_SIZE - offset)); + page_is_high = PageHighMem(page); if (page_is_high) local_irq_save(flags); -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
