From 8fed43684174b68f04d01d1210fd00536af790df Mon Sep 17 00:00:00 2001 From: Bartlomiej Zolnierkiewicz Date: Wed, 25 Feb 2009 20:28:24 +0100 Subject: ide: fix refcounting in device drivers During host driver module removal del_gendisk() results in a final put on drive->gendev and freeing the drive by drive_release_dev(). Convert device drivers from using struct kref to use struct device so device driver's object holds reference on ->gendev and prevents drive from prematurely going away. Also fix ->remove methods to not erroneously drop reference on a host driver by using only put_device() instead of ide*_put(). Reported-by: Stanislaw Gruszka Tested-by: Stanislaw Gruszka Signed-off-by: Bartlomiej Zolnierkiewicz --- include/linux/ide.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/linux/ide.h') diff --git a/include/linux/ide.h b/include/linux/ide.h index 194da5a4b0d6..fe235b65207e 100644 --- a/include/linux/ide.h +++ b/include/linux/ide.h @@ -663,7 +663,7 @@ typedef struct ide_drive_s ide_drive_t; #define to_ide_device(dev) container_of(dev, ide_drive_t, gendev) #define to_ide_drv(obj, cont_type) \ - container_of(obj, struct cont_type, kref) + container_of(obj, struct cont_type, dev) #define ide_drv_g(disk, cont_type) \ container_of((disk)->private_data, struct cont_type, driver) -- cgit v1.2.3 From 849d7130001ab740a5a4778a561049841fdd77c9 Mon Sep 17 00:00:00 2001 From: Stanislaw Gruszka Date: Thu, 5 Mar 2009 16:10:57 +0100 Subject: ide: allow to wrap interrupt handler Signed-off-by: Stanislaw Gruszka Cc: Andrew Victor [bart: minor checkpatch.pl / CodingStyle fixups] Signed-off-by: Bartlomiej Zolnierkiewicz --- drivers/ide/ide-io.c | 1 + drivers/ide/ide-probe.c | 7 ++++++- include/linux/ide.h | 1 + 3 files changed, 8 insertions(+), 1 deletion(-) (limited to 'include/linux/ide.h') diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c index 9ff90cb1dbf1..a9a6c208288a 100644 --- a/drivers/ide/ide-io.c +++ b/drivers/ide/ide-io.c @@ -1162,6 +1162,7 @@ out_early: return irq_ret; } +EXPORT_SYMBOL_GPL(ide_intr); /** * ide_do_drive_cmd - issue IDE special command diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c index ce0818a993f6..ee8e3e7cad51 100644 --- a/drivers/ide/ide-probe.c +++ b/drivers/ide/ide-probe.c @@ -950,6 +950,7 @@ static int ide_port_setup_devices(ide_hwif_t *hwif) static int init_irq (ide_hwif_t *hwif) { struct ide_io_ports *io_ports = &hwif->io_ports; + irq_handler_t irq_handler; int sa = 0; mutex_lock(&ide_cfg_mtx); @@ -959,6 +960,10 @@ static int init_irq (ide_hwif_t *hwif) hwif->timer.function = &ide_timer_expiry; hwif->timer.data = (unsigned long)hwif; + irq_handler = hwif->host->irq_handler; + if (irq_handler == NULL) + irq_handler = ide_intr; + #if defined(__mc68000__) sa = IRQF_SHARED; #endif /* __mc68000__ */ @@ -969,7 +974,7 @@ static int init_irq (ide_hwif_t *hwif) if (io_ports->ctl_addr) hwif->tp_ops->set_irq(hwif, 1); - if (request_irq(hwif->irq, &ide_intr, sa, hwif->name, hwif)) + if (request_irq(hwif->irq, irq_handler, sa, hwif->name, hwif)) goto out_up; if (!hwif->rqsize) { diff --git a/include/linux/ide.h b/include/linux/ide.h index fe235b65207e..e0cedfe9fad4 100644 --- a/include/linux/ide.h +++ b/include/linux/ide.h @@ -866,6 +866,7 @@ struct ide_host { unsigned int n_ports; struct device *dev[2]; unsigned int (*init_chipset)(struct pci_dev *); + irq_handler_t irq_handler; unsigned long host_flags; void *host_priv; ide_hwif_t *cur_port; /* for hosts requiring serialization */ -- cgit v1.2.3 From 5d82720a7f41f0c877e026c7d17e3bf20ccdbae0 Mon Sep 17 00:00:00 2001 From: FUJITA Tomonori Date: Fri, 13 Mar 2009 21:16:13 +0100 Subject: ide: save the returned value of dma_map_sg dma_map_sg could return a value different to 'nents' argument of dma_map_sg so the ide stack needs to save it for the later usage (e.g. for_each_sg). The ide stack also needs to save the original sg_nents value for pci_unmap_sg. Signed-off-by: FUJITA Tomonori [bart: backport to Linus' tree] Signed-off-by: Bartlomiej Zolnierkiewicz --- drivers/ide/ide-dma.c | 12 +++++++++--- include/linux/ide.h | 1 + 2 files changed, 10 insertions(+), 3 deletions(-) (limited to 'include/linux/ide.h') diff --git a/drivers/ide/ide-dma.c b/drivers/ide/ide-dma.c index 72ebab0bc755..059c90bb5ad2 100644 --- a/drivers/ide/ide-dma.c +++ b/drivers/ide/ide-dma.c @@ -128,6 +128,7 @@ int ide_build_sglist(ide_drive_t *drive, struct request *rq) { ide_hwif_t *hwif = drive->hwif; struct scatterlist *sg = hwif->sg_table; + int i; ide_map_sg(drive, rq); @@ -136,8 +137,13 @@ int ide_build_sglist(ide_drive_t *drive, struct request *rq) else hwif->sg_dma_direction = DMA_TO_DEVICE; - return dma_map_sg(hwif->dev, sg, hwif->sg_nents, - hwif->sg_dma_direction); + i = dma_map_sg(hwif->dev, sg, hwif->sg_nents, hwif->sg_dma_direction); + if (i) { + hwif->orig_sg_nents = hwif->sg_nents; + hwif->sg_nents = i; + } + + return i; } EXPORT_SYMBOL_GPL(ide_build_sglist); @@ -156,7 +162,7 @@ void ide_destroy_dmatable(ide_drive_t *drive) { ide_hwif_t *hwif = drive->hwif; - dma_unmap_sg(hwif->dev, hwif->sg_table, hwif->sg_nents, + dma_unmap_sg(hwif->dev, hwif->sg_table, hwif->orig_sg_nents, hwif->sg_dma_direction); } EXPORT_SYMBOL_GPL(ide_destroy_dmatable); diff --git a/include/linux/ide.h b/include/linux/ide.h index e0cedfe9fad4..25087aead657 100644 --- a/include/linux/ide.h +++ b/include/linux/ide.h @@ -797,6 +797,7 @@ typedef struct hwif_s { struct scatterlist *sg_table; int sg_max_nents; /* Maximum number of entries in it */ int sg_nents; /* Current number of entries in it */ + int orig_sg_nents; int sg_dma_direction; /* dma transfer direction */ /* data phase of the active command (currently only valid for PIO/DMA) */ -- cgit v1.2.3