Messages in this thread Patch in this message |  | | Subject | [PATCH 03/17] hpsa: enable bus master bit after pci_enable_device | | From | "Stephen M. Cameron" <> | | Date | Fri, 20 Apr 2012 10:06:29 -0500 |
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From: Stephen M. Cameron <scameron@beardog.cce.hp.com>
pci_disable_device() disables the bus master bit and pci_enable_device does not re-enable it. It needs to be enabled.
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com> --- drivers/scsi/hpsa.c | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c index 5119ce6..363619d 100644 --- a/drivers/scsi/hpsa.c +++ b/drivers/scsi/hpsa.c @@ -3917,6 +3917,7 @@ static int __devinit hpsa_enter_simple_mode(struct ctlr_info *h) static int __devinit hpsa_pci_init(struct ctlr_info *h) { int prod_index, err; + u16 command_register; prod_index = hpsa_lookup_board_id(h->pdev, &h->board_id); if (prod_index < 0) @@ -3933,6 +3934,11 @@ static int __devinit hpsa_pci_init(struct ctlr_info *h) return err; } + /* Enable bus mastering (pci_disable_device may disable this) */ + pci_read_config_word(h->pdev, PCI_COMMAND, &command_register); + command_register |= PCI_COMMAND_MASTER; + pci_write_config_word(h->pdev, PCI_COMMAND, command_register); + err = pci_request_regions(h->pdev, HPSA); if (err) { dev_err(&h->pdev->dev,
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