Messages in this thread | | | Date | Thu, 05 Sep 2013 18:32:36 +0400 | From | Sergei Shtylyov <> | Subject | Re: [PATCH v2 5/6] AHCI: Check MRSM bit when multiple MSIs enabled |
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Hello.
On 09/05/2013 04:54 PM, Alexander Gordeev wrote:
> Do not trust the hardware and always check if MSI > Revert to Single Message mode was enforced. Fall > back to the single MSI mode in case it did. Not > doing so might screw up the interrupt handling.
> Signed-off-by: Alexander Gordeev <agordeev@redhat.com> > --- > drivers/ata/ahci.c | 16 ++++++++++++++++ > drivers/ata/ahci.h | 1 + > 2 files changed, 17 insertions(+), 0 deletions(-)
> diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c > index a6bb618..af5d535 100644 > --- a/drivers/ata/ahci.c > +++ b/drivers/ata/ahci.c > @@ -1091,6 +1091,14 @@ static inline void ahci_gtf_filter_workaround(struct ata_host *host) > {} > #endif > > +static int ahci_get_mrsm(struct ahci_host_priv *hpriv) > +{ > + void __iomem *mmio = hpriv->mmio; > + u32 ctl = readl(mmio + HOST_CTL); > + > + return (ctl & HOST_MRSM);
Parens not needed here, in case you'll respin this once more.
WBR, Sergei
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