s390/vmlogrdr: fix IUCV buffer allocation
The buffer for iucv_message_receive() needs to be below 2 GB. In __iucv_message_receive(), the buffer address is casted to an u32, which would result in either memory corruption or an addressing exception when using addresses >= 2 GB. Fix this by using GFP_DMA for the buffer allocation. Cc: stable@vger.kernel.org Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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@ -870,7 +870,7 @@ static int __init vmlogrdr_init(void)
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goto cleanup;
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for (i=0; i < MAXMINOR; ++i ) {
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sys_ser[i].buffer = (char *) get_zeroed_page(GFP_KERNEL);
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sys_ser[i].buffer = (char *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
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if (!sys_ser[i].buffer) {
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rc = -ENOMEM;
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break;
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