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e346e231b4
Here we've got to a situation when tasklet called usleep_range() in PTT acquire logic, thus welcome to the "scheduling while atomic" BUG(). BUG: scheduling while atomic: swapper/24/0/0x00000100 [<ffffffffb41c6199>] schedule+0x29/0x70 [<ffffffffb41c5512>] schedule_hrtimeout_range_clock+0xb2/0x150 [<ffffffffb41c55c3>] schedule_hrtimeout_range+0x13/0x20 [<ffffffffb41c3bcf>] usleep_range+0x4f/0x70 [<ffffffffc08d3e58>] qed_ptt_acquire+0x38/0x100 [qed] [<ffffffffc08eac48>] _qed_get_vport_stats+0x458/0x580 [qed] [<ffffffffc08ead8c>] qed_get_vport_stats+0x1c/0xd0 [qed] [<ffffffffc08dffd3>] qed_get_protocol_stats+0x93/0x100 [qed] qed_mcp_send_protocol_stats case MFW_DRV_MSG_GET_LAN_STATS: case MFW_DRV_MSG_GET_FCOE_STATS: case MFW_DRV_MSG_GET_ISCSI_STATS: case MFW_DRV_MSG_GET_RDMA_STATS: [<ffffffffc08e36d8>] qed_mcp_handle_events+0x2d8/0x890 [qed] qed_int_assertion qed_int_attentions [<ffffffffc08d9490>] qed_int_sp_dpc+0xa50/0xdc0 [qed] [<ffffffffb3aa7623>] tasklet_action+0x83/0x140 [<ffffffffb41d9125>] __do_softirq+0x125/0x2bb [<ffffffffb41d560c>] call_softirq+0x1c/0x30 [<ffffffffb3a30645>] do_softirq+0x65/0xa0 [<ffffffffb3aa78d5>] irq_exit+0x105/0x110 [<ffffffffb41d8996>] do_IRQ+0x56/0xf0 Fix this by making caller to provide the context whether it could be in atomic context flow or not when getting stats from QED driver. QED driver based on the context provided decide to schedule out or not when acquiring the PTT BAR window. We faced the BUG_ON() while getting vport stats, but according to the code same issue could happen for fcoe and iscsi statistics as well, so fixing them too. Fixes: |
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arch | ||
block | ||
certs | ||
crypto | ||
Documentation | ||
drivers | ||
fs | ||
include | ||
init | ||
io_uring | ||
ipc | ||
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mm | ||
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usr | ||
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.cocciconfig | ||
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Makefile | ||
README |
Linux kernel ============ There are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. Please read Documentation/admin-guide/README.rst first. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. The formatted documentation can also be read online at: https://www.kernel.org/doc/html/latest/ There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.