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4a7a4cfac5
This is prerequisite for the Linux update. All dependencies relying on the 'linux' have been adjusted to use 'legacy_linux'. Issue #5264
16 lines
610 B
Diff
16 lines
610 B
Diff
USB devio splits large transaction into 16 KiB buffers in scatter-gather
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lists. Unfortunately, this mechanism seems unreliable most certainly because
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of issue #4809 "DDE Linux struct page object aliasing".
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--- src/linux/drivers/usb/core/devio.c
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+++ src/linux/drivers/usb/core/devio.c
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@@ -53,7 +53,7 @@
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#define USB_MAXBUS 64
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#define USB_DEVICE_MAX (USB_MAXBUS * 128)
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-#define USB_SG_SIZE 16384 /* split-size for large txs */
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+#define USB_SG_SIZE (1024 * 1024) /* split-size for large txs */
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/* Mutual exclusion for ps->list in resume vs. release and remove */
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static DEFINE_MUTEX(usbfs_mutex);
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