ide: add IDE_HFLAG_ERROR_STOPS_FIFO host flag

Add IDE_HFLAG_ERROR_STOPS_FIFO host flag and use it instead
of hwif->err_stops_fifo.  As a side-effect this change fixes
hwif->err_stops_fifo not being restored by ide_hwif_restore().
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

drivers/ide/ide-io.c

@@ -484,7 +484,8 @@ static ide_startstop_t ide_ata_error(ide_drive_t *drive, struct request *rq, u8
 		}
 	}
 
-	if ((stat & DRQ_STAT) && rq_data_dir(rq) == READ && hwif->err_stops_fifo == 0)
+	if ((stat & DRQ_STAT) && rq_data_dir(rq) == READ &&
+	    (hwif->host_flags & IDE_HFLAG_ERROR_STOPS_FIFO) == 0)
 		try_to_flush_leftover_data(drive);
 
 	if (rq->errors >= ERROR_MAX || blk_noretry_request(rq)) {

drivers/ide/pci/pdc202xx_new.c

@@ -471,8 +471,6 @@ static void __devinit init_hwif_pdc202new(ide_hwif_t *hwif)
 	hwif->quirkproc = &pdcnew_quirkproc;
 	hwif->resetproc = &pdcnew_reset;
 
-	hwif->err_stops_fifo = 1;
-
 	hwif->drives[0].autotune = hwif->drives[1].autotune = 1;
 
 	if (hwif->dma_base == 0)
@@ -510,6 +508,7 @@ static struct pci_dev * __devinit pdc20270_get_dev2(struct pci_dev *dev)
 		.init_chipset	= init_chipset_pdcnew, \
 		.init_hwif	= init_hwif_pdc202new, \
 		.host_flags	= IDE_HFLAG_POST_SET_MODE | \
+				  IDE_HFLAG_ERROR_STOPS_FIFO | \
 				  IDE_HFLAG_OFF_BOARD, \
 		.pio_mask	= ATA_PIO4, \
 		.mwdma_mask	= ATA_MWDMA2, \

drivers/ide/pci/pdc202xx_old.c

@@ -317,8 +317,6 @@ static void __devinit init_hwif_pdc202xx(ide_hwif_t *hwif)
 	if (hwif->pci_dev->device != PCI_DEVICE_ID_PROMISE_20246)
 		hwif->resetproc = &pdc202xx_reset;
 
-	hwif->err_stops_fifo = 1;
-
 	hwif->drives[0].autotune = hwif->drives[1].autotune = 1;
 
 	if (hwif->dma_base == 0)
@@ -393,7 +391,8 @@ static void __devinit pdc202ata4_fixup_irq(struct pci_dev *dev,
 		.init_hwif	= init_hwif_pdc202xx, \
 		.init_dma	= init_dma_pdc202xx, \
 		.extra		= 48, \
-		.host_flags	= IDE_HFLAG_OFF_BOARD, \
+		.host_flags	= IDE_HFLAG_ERROR_STOPS_FIFO | \
+				  IDE_HFLAG_OFF_BOARD, \
 		.pio_mask	= ATA_PIO4, \
 		.mwdma_mask	= ATA_MWDMA2, \
 		.udma_mask	= udma, \
@@ -406,7 +405,8 @@ static ide_pci_device_t pdc202xx_chipsets[] __devinitdata = {
 		.init_hwif	= init_hwif_pdc202xx,
 		.init_dma	= init_dma_pdc202xx,
 		.extra		= 16,
-		.host_flags	= IDE_HFLAG_OFF_BOARD,
+		.host_flags	= IDE_HFLAG_ERROR_STOPS_FIFO |
+				  IDE_HFLAG_OFF_BOARD,
 		.pio_mask	= ATA_PIO4,
 		.mwdma_mask	= ATA_MWDMA2,
 		.udma_mask	= ATA_UDMA2,

include/linux/ide.h

@@ -799,7 +799,6 @@ typedef struct hwif_s {
 	unsigned	auto_poll  : 1; /* supports nop auto-poll */
 	unsigned	sg_mapped  : 1;	/* sg_table and sg_nents are ready */
 	unsigned	no_io_32bit : 1; /* 1 = can not do 32-bit IO ops */
-	unsigned	err_stops_fifo : 1; /* 1=data FIFO is cleared by an error */
 	unsigned	mmio       : 1; /* host uses MMIO */
 
 	struct device	gendev;
@@ -1256,6 +1255,8 @@ enum {
 	IDE_HFLAG_NO_LBA48		= (1 << 17),
 	/* no LBA48 DMA */
 	IDE_HFLAG_NO_LBA48_DMA		= (1 << 18),
+	/* data FIFO is cleared by an error */
+	IDE_HFLAG_ERROR_STOPS_FIFO	= (1 << 19),
 };
 
 #ifdef CONFIG_BLK_DEV_OFFBOARD