Commit bac1ec55 authored by Tejas Joglekar's avatar Tejas Joglekar Committed by Greg Kroah-Hartman
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usb: xhci: Set quirk for XHCI_SG_TRB_CACHE_SIZE_QUIRK 



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: default avatarTejas Joglekar <joglekar@synopsys.com>
Signed-off-by: default avatarMathias 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: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent b175d273

drivers/usb/host/xhci-plat.c

+3 −0
Original line number Diff line number Diff line
@@ -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;

drivers/usb/host/xhci.h

+1 −0
Original line number Diff line number Diff line
@@ -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;