Messages in this thread Patch in this message | | | From | Janet Morgan <> | Subject | [PATCH] aic7xxx bouncing over 4G | Date | Fri, 20 Dec 2002 16:12:48 -0800 (PST) |
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I have an Adaptec AIC-7897 Ultra2 SCSI adapter on a system with 8G of physical memory. The adapter is using bounce buffers when DMA'ing to memory >4G because of a bug in the aic7xxx driver.
The problem is ahc_linux_get_memsize() returns an erroneous memory size (i.e., shifts out the high-order bits) for configurations >4G and the wrong dma mask is set by the caller. The following patch fixes the problem by adding the needed cast.
--- linux-2.5.52/drivers/scsi/aic7xxx/aic7xxx_linux.c Sun Dec 15 18:07:54 2002 +++ nobounce/drivers/scsi/aic7xxx/aic7xxx_linux.c Fri Dec 20 16:08:11 2002 @@ -1156,7 +1156,7 @@ struct sysinfo si; si_meminfo(&si); - return (si.totalram << PAGE_SHIFT); + return ((uint64_t)si.totalram << PAGE_SHIFT); } /* - 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/
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