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84 lines
2.8 KiB
Diff
84 lines
2.8 KiB
Diff
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From 3c3c5a15a17649092ecf4c128478b267676c3353 Mon Sep 17 00:00:00 2001
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From: P33M <P33M@github.com>
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Date: Mon, 22 Jul 2013 14:08:26 +0100
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Subject: [PATCH 083/174] dwc_otg: prevent BUG() in TT allocation if hub
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address is > 16
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A fixed-size array is used to track TT allocation. This was
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previously set to 16 which caused a crash because
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dwc_otg_hcd_allocate_port would read past the end of the array.
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This was hit if a hub was plugged in which enumerated as addr > 16,
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due to previous device resets or unplugs.
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Also add #ifdef FIQ_DEBUG around hcd->hub_port_alloc[], which grows
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to a large size if 128 hub addresses are supported. This field is
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for debug only for tracking which frame an allocate happened in.
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---
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drivers/usb/host/dwc_otg/dwc_otg_hcd.c | 7 ++++++-
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drivers/usb/host/dwc_otg/dwc_otg_hcd.h | 6 ++++--
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drivers/usb/host/dwc_otg/dwc_otg_hcd_intr.c | 3 ++-
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3 files changed, 12 insertions(+), 4 deletions(-)
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--- a/drivers/usb/host/dwc_otg/dwc_otg_hcd.c
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+++ b/drivers/usb/host/dwc_otg/dwc_otg_hcd.c
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@@ -983,7 +983,9 @@ int dwc_otg_hcd_init(dwc_otg_hcd_t * hcd
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hcd->periodic_qh_count = 0;
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DWC_MEMSET(hcd->hub_port, 0, sizeof(hcd->hub_port));
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+#ifdef FIQ_DEBUG
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DWC_MEMSET(hcd->hub_port_alloc, -1, sizeof(hcd->hub_port_alloc));
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+#endif
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out:
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return retval;
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@@ -1317,7 +1319,9 @@ int dwc_otg_hcd_allocate_port(dwc_otg_hc
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qh->skip_count = 0;
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hcd->hub_port[hub_addr] |= 1 << port_addr;
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fiq_print(FIQDBG_PORTHUB, "H%dP%d:A %d", hub_addr, port_addr, DWC_CIRCLEQ_FIRST(&qh->qtd_list)->urb->pipe_info.ep_num);
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+#ifdef FIQ_DEBUG
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hcd->hub_port_alloc[hub_addr * 16 + port_addr] = dwc_otg_hcd_get_frame_number(hcd);
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+#endif
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return 0;
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}
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}
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@@ -1331,8 +1335,9 @@ void dwc_otg_hcd_release_port(dwc_otg_hc
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hcd->fops->hub_info(hcd, DWC_CIRCLEQ_FIRST(&qh->qtd_list)->urb->priv, &hub_addr, &port_addr);
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hcd->hub_port[hub_addr] &= ~(1 << port_addr);
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+#ifdef FIQ_DEBUG
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hcd->hub_port_alloc[hub_addr * 16 + port_addr] = -1;
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-
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+#endif
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fiq_print(FIQDBG_PORTHUB, "H%dP%d:RO%d", hub_addr, port_addr, DWC_CIRCLEQ_FIRST(&qh->qtd_list)->urb->pipe_info.ep_num);
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}
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--- a/drivers/usb/host/dwc_otg/dwc_otg_hcd.h
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+++ b/drivers/usb/host/dwc_otg/dwc_otg_hcd.h
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@@ -577,8 +577,10 @@ struct dwc_otg_hcd {
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uint32_t *frame_list;
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/** Hub - Port assignment */
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- int hub_port[16];
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- int hub_port_alloc[256];
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+ int hub_port[128];
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+#ifdef FIQ_DEBUG
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+ int hub_port_alloc[2048];
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+#endif
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/** Frame List DMA address */
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dma_addr_t frame_list_dma;
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--- a/drivers/usb/host/dwc_otg/dwc_otg_hcd_intr.c
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+++ b/drivers/usb/host/dwc_otg/dwc_otg_hcd_intr.c
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@@ -1419,8 +1419,9 @@ cleanup:
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}
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hcd->hub_port[hc->hub_addr] &= ~(1 << hc->port_addr);
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+#ifdef FIQ_DEBUG
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hcd->hub_port_alloc[hc->hub_addr * 16 + hc->port_addr] = -1;
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-
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+#endif
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fiq_print(FIQDBG_PORTHUB, "H%dP%d:RR%d", hc->hub_addr, hc->port_addr, endp);
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}
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