#include #include #include #include #include #include #include "pager.h" #include "run-command.h" #include "sigchain.h" #include "subcmd-config.h" /* * This is split up from the rest of git so that we can do * something different on Windows. */ static int spawned_pager; static int pager_columns; void pager_init(const char *pager_env) { subcmd_config.pager_env = pager_env; } static void pager_preexec(void) { /* * Work around bug in "less" by not starting it until we * have real input */ fd_set in; FD_ZERO(&in); FD_SET(0, &in); select(1, &in, NULL, &in, NULL); setenv("LESS", "FRSX", 0); } static const char *pager_argv[] = { "sh", "-c", NULL, NULL }; static struct child_process pager_process; static void wait_for_pager(void) { fflush(stdout); fflush(stderr); /* signal EOF to pager */ close(1); close(2); finish_command(&pager_process); } static void wait_for_pager_signal(int signo) { wait_for_pager(); sigchain_pop(signo); raise(signo); } void setup_pager(void) { const char *pager = getenv(subcmd_config.pager_env); struct winsize sz; if (!isatty(1)) return; if (ioctl(1, TIOCGWINSZ, &sz) == 0) pager_columns = sz.ws_col; if (!pager) pager = getenv("PAGER"); if (!(pager || access("/usr/bin/pager", X_OK))) pager = "/usr/bin/pager"; if (!(pager || access("/usr/bin/less", X_OK))) pager = "/usr/bin/less"; if (!pager) pager = "cat"; if (!*pager || !strcmp(pager, "cat")) return; spawned_pager = 1; /* means we are emitting to terminal */ /* spawn the pager */ pager_argv[2] = pager; pager_process.argv = pager_argv; pager_process.in = -1; pager_process.preexec_cb = pager_preexec; if (start_command(&pager_process)) return; /* original process continues, but writes to the pipe */ dup2(pager_process.in, 1); if (isatty(2)) dup2(pager_process.in, 2); close(pager_process.in); /* this makes sure that the parent terminates after the pager */ sigchain_push_common(wait_for_pager_signal); atexit(wait_for_pager); } int pager_in_use(void) { return spawned_pager; } int pager_get_columns(void) { char *s; s = getenv("COLUMNS"); if (s) return atoi(s); return (pager_columns ? pager_columns : 80) - 2; } ude/soc/nps/common.h'>
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authorChristoph Hellwig <hch@lst.de>2017-01-30 13:15:41 +0100
committerBjorn Helgaas <bhelgaas@google.com>2017-02-02 10:35:46 -0600
commitdfef358bd1beb4e7b5c94eca944be9cd23dfc752 (patch)
treeb9a2afb38a4c2ac8ad31f49ec0d71fe9e5b1994c /include/soc/nps/common.h
parent030305d69fc6963c16003f50d7e8d74b02d0a143 (diff)
PCI/MSI: Don't apply affinity if there aren't enough vectors left
Bart reported a problem wіth an out of bounds access in the low-level IRQ affinity code, which we root caused to the qla2xxx driver assigning all its MSI-X vectors to the pre and post vectors, and not having any left for the actually spread IRQs. Fix this issue by not asking for affinity assignment when there are no vectors to assign left. Fixes: 402723ad5c62 ("PCI/MSI: Provide pci_alloc_irq_vectors_affinity()") Link: https://lkml.kernel.org/r/1485359225.3093.3.camel@sandisk.com Reported-by: Bart Van Assche <bart.vanassche@sandisk.com> Tested-by: Bart Van Assche <bart.vanassche@sandisk.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'include/soc/nps/common.h')