| Message ID | 1450667905-2968-1-git-send-email-majun258@huawei.com |
|---|---|
| State | Accepted |
| Commit | aff5e06b0dda7704ff2fa45162cfc4dde316a6f1 |
| Headers | show |
在 2015/12/21 18:43, Marc Zyngier 写道: > On Mon, 21 Dec 2015 11:18:25 +0800 > MaJun <majun258@huawei.com> wrote: > >> From: Ma Jun <majun258@huawei.com> >> >> The current MSI framework can only support 256 platform MSIs. >> >> But on Hisilicon platform, some network related devices has about 500 >> wired interrupts. >> >> To support these devices, we need a new maximum value more than 256. >> >> Signed-off-by: Ma Jun <majun258@huawei.com> >> --- >> drivers/base/platform-msi.c | 2 +- >> 1 files changed, 1 insertions(+), 1 deletions(-) >> >> diff --git a/drivers/base/platform-msi.c b/drivers/base/platform-msi.c >> index a203896..9c00d3f 100644 >> --- a/drivers/base/platform-msi.c >> +++ b/drivers/base/platform-msi.c >> @@ -24,7 +24,7 @@ >> #include <linux/msi.h> >> #include <linux/slab.h> >> >> -#define DEV_ID_SHIFT 24 >> +#define DEV_ID_SHIFT 22 >> #define MAX_DEV_MSIS (1 << (32 - DEV_ID_SHIFT)) >> >> /* > > If we bother doing that, why not directly aligning it with MSI-X and > allow up to 2048 interrupts per device? It is only an extra bit, and > that still leaves 21 bits worth of device IDs, while still having > hwirq as an unsigned long (32bit on 32bit architectures). > Ok, I'll changed this value to 2048 Thanks Ma Jun > Thanks, > > M. > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
diff --git a/drivers/base/platform-msi.c b/drivers/base/platform-msi.c index a203896..9c00d3f 100644 --- a/drivers/base/platform-msi.c +++ b/drivers/base/platform-msi.c @@ -24,7 +24,7 @@ #include <linux/msi.h> #include <linux/slab.h> -#define DEV_ID_SHIFT 24 +#define DEV_ID_SHIFT 22 #define MAX_DEV_MSIS (1 << (32 - DEV_ID_SHIFT)) /*