Hi Samuel, First bad commit (maybe != root cause):
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 7a7fd0de4a9804299793e564a555a49c1fc924cb commit: 2067fd92d75b6d9085a43caf050bca5d88c491b8 staging/speakup: Move out of staging date: 7 months ago config: powerpc64-randconfig-m031-20210302 (attached as .config) compiler: powerpc64-linux-gcc (GCC) 9.3.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <[email protected]> smatch warnings: drivers/accessibility/speakup/serialio.c:54 spk_serial_init() warn: always true condition '(index >= (0 / 20 + (0))) => (s32min-s32max >= 0)' vim +54 drivers/accessibility/speakup/serialio.c 1e441594e509c3 drivers/staging/speakup/serialio.c Okash Khawaja 2017-03-14 45 3ee0017e03cd79 drivers/staging/speakup/serialio.c Jiri Slaby 2012-03-05 46 const struct old_serial_port *spk_serial_init(int index) c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 47 { c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 48 int baud = 9600, quot = 0; c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 49 unsigned int cval = 0; c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 50 int cflag = CREAD | HUPCL | CLOCAL | B9600 | CS8; 327b882d3bcc1f drivers/staging/speakup/serialio.c Samuel Thibault 2016-01-15 51 const struct old_serial_port *ser; c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 52 int err; c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 53 327b882d3bcc1f drivers/staging/speakup/serialio.c Samuel Thibault 2016-01-15 @54 if (index >= ARRAY_SIZE(rs_table)) { 327b882d3bcc1f drivers/staging/speakup/serialio.c Samuel Thibault 2016-01-15 55 pr_info("no port info for ttyS%d\n", index); 327b882d3bcc1f drivers/staging/speakup/serialio.c Samuel Thibault 2016-01-15 56 return NULL; 327b882d3bcc1f drivers/staging/speakup/serialio.c Samuel Thibault 2016-01-15 57 } 327b882d3bcc1f drivers/staging/speakup/serialio.c Samuel Thibault 2016-01-15 58 ser = rs_table + index; 327b882d3bcc1f drivers/staging/speakup/serialio.c Samuel Thibault 2016-01-15 59 c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 60 /* Divisor, bytesize and parity */ c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 61 quot = ser->baud_base / baud; c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 62 cval = cflag & (CSIZE | CSTOPB); c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 63 #if defined(__powerpc__) || defined(__alpha__) c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 64 cval >>= 8; c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 65 #else /* !__powerpc__ && !__alpha__ */ c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 66 cval >>= 4; c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 67 #endif /* !__powerpc__ && !__alpha__ */ c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 68 if (cflag & PARENB) c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 69 cval |= UART_LCR_PARITY; c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 70 if (!(cflag & PARODD)) c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 71 cval |= UART_LCR_EPAR; c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 72 if (synth_request_region(ser->port, 8)) { c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 73 /* try to take it back. */ 3a046c19158e89 drivers/staging/speakup/serialio.c Keerthimai Janarthanan 2014-03-18 74 pr_info("Ports not available, trying to steal them\n"); c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 75 __release_region(&ioport_resource, ser->port, 8); c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 76 err = synth_request_region(ser->port, 8); c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 77 if (err) { 3ee0017e03cd79 drivers/staging/speakup/serialio.c Jiri Slaby 2012-03-05 78 pr_warn("Unable to allocate port at %x, errno %i", baf9ac9ff8864c drivers/staging/speakup/serialio.c William Hubbs 2010-10-15 79 ser->port, err); c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 80 return NULL; c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 81 } c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 82 } c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 83 c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 84 /* Disable UART interrupts, set DTR and RTS high 13d825edd4441d drivers/staging/speakup/serialio.c Aleksei Fedotov 2015-08-14 85 * and set speed. 13d825edd4441d drivers/staging/speakup/serialio.c Aleksei Fedotov 2015-08-14 86 */ c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 87 outb(cval | UART_LCR_DLAB, ser->port + UART_LCR); /* set DLAB */ c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 88 outb(quot & 0xff, ser->port + UART_DLL); /* LS of divisor */ c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 89 outb(quot >> 8, ser->port + UART_DLM); /* MS of divisor */ c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 90 outb(cval, ser->port + UART_LCR); /* reset DLAB */ c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 91 c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 92 /* Turn off Interrupts */ c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 93 outb(0, ser->port + UART_IER); c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 94 outb(UART_MCR_DTR | UART_MCR_RTS, ser->port + UART_MCR); c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 95 c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 96 /* If we read 0xff from the LSR, there is no UART here. */ c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 97 if (inb(ser->port + UART_LSR) == 0xff) { c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 98 synth_release_region(ser->port, 8); c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 99 serstate = NULL; c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 100 return NULL; c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 101 } c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 102 c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 103 mdelay(1); c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 104 speakup_info.port_tts = ser->port; c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 105 serstate = ser; c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 106 c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 107 start_serial_interrupt(ser->irq); c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 108 c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 109 return ser; c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 110 } c6e3fd22cd5383 drivers/staging/speakup/serialio.c William Hubbs 2010-10-07 111 :::::: The code at line 54 was first introduced by commit :::::: 327b882d3bcc1fba82dbd39b5cf5a838c81218e2 Staging: speakup: Fix getting port information :::::: TO: Samuel Thibault <[email protected]> :::::: CC: Greg Kroah-Hartman <[email protected]> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/[email protected]
.config.gz
Description: application/gzip
