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usb: xhci: Set quirk for XHCI_SG_TRB_CACHE_SIZE_QUIRK

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commit bac1ec5514 upstream.

This commit uses the private data passed by parent device
to set the quirk for Synopsys xHC. This patch fixes the
SNPS xHC hang issue when the data is scattered across
small buffers which does not make atleast MPS size for
given TRB cache size of SNPS xHC.

Signed-off-by: Tejas Joglekar <joglekar@synopsys.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20201208092912.1773650-2-mathias.nyman@linux.intel.com
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tejas Joglekar 2020-12-08 11:29:08 +02:00 committed by Greg Kroah-Hartman
parent 2bd9751e67
commit 1bee58e891
2 changed files with 4 additions and 0 deletions
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3
drivers/usb/host/xhci-plat.c
View File

@ -333,6 +333,9 @@ static int xhci_plat_probe(struct platform_device *pdev)
if (priv && (priv->quirks & XHCI_SKIP_PHY_INIT))
hcd->skip_phy_initialization = 1;
if (priv && (priv->quirks & XHCI_SG_TRB_CACHE_SIZE_QUIRK))
xhci->quirks |= XHCI_SG_TRB_CACHE_SIZE_QUIRK;
ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
if (ret)
goto disable_usb_phy;

1
drivers/usb/host/xhci.h
View File

@ -1878,6 +1878,7 @@ struct xhci_hcd {
#define XHCI_RENESAS_FW_QUIRK BIT_ULL(36)
#define XHCI_SKIP_PHY_INIT BIT_ULL(37)
#define XHCI_DISABLE_SPARSE BIT_ULL(38)
#define XHCI_SG_TRB_CACHE_SIZE_QUIRK BIT_ULL(39)
unsigned int num_active_eps;
unsigned int limit_active_eps;