Currently, when first failure occurs while reading of the block, we stop reading the block and jump to the next capability. This doesn't cover the case of block with "holes" of inaccessible dwords, followed by accessible dwords. This patch address this problem. In case of failure while reading the complete block in one transaction, (because of one or more dwords is inaccessible), we read the remaining dwords of the block dword-by-dword, one dword per transaction, till the end of the block. By doing this, we handle the case of block with "holes" of inaccessible dwords, followed by accessible dwords. The accessible dwords are shown with the fields: <offset> <relative_offset> <cap_id> <vs_cap_id> <value> E.g.: 0x01eb 236 0x05 0x06 0x0000d166 While the inaccesible dwords are shown as: <offset> <not accessible> E.g.: 0x01ed <not accessible> Signed-off-by: Gil Fine <gil.fine@xxxxxxxxx> --- drivers/thunderbolt/debugfs.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) diff --git a/drivers/thunderbolt/debugfs.c b/drivers/thunderbolt/debugfs.c index 201036507cb8..c850b0ac098c 100644 --- a/drivers/thunderbolt/debugfs.c +++ b/drivers/thunderbolt/debugfs.c @@ -265,10 +265,8 @@ static void cap_show_by_dw(struct seq_file *s, struct tb_switch *sw, else ret = tb_sw_read(sw, &data, TB_CFG_SWITCH, cap + offset + i, 1); if (ret) { - seq_printf(s, "0x%04x <not accessible>\n", cap + offset); - if (dwords - i > 1) - seq_printf(s, "0x%04x ...\n", cap + offset + 1); - return; + seq_printf(s, "0x%04x <not accessible>\n", cap + offset + i); + continue; } seq_printf(s, "0x%04x %4d 0x%02x 0x%02x 0x%08x\n", cap + offset + i, @@ -292,7 +290,7 @@ static void cap_show(struct seq_file *s, struct tb_switch *sw, else ret = tb_sw_read(sw, data, TB_CFG_SWITCH, cap + offset, dwords); if (ret) { - cap_show_by_dw(s, sw, port, cap, offset, cap_id, vsec_id, dwords); + cap_show_by_dw(s, sw, port, cap, offset, cap_id, vsec_id, length); return; } -- 2.17.1 --------------------------------------------------------------------- Intel Israel (74) Limited This e-mail and any attachments may contain confidential material for the sole use of the intended recipient(s). Any review or distribution by others is strictly prohibited. If you are not the intended recipient, please contact the sender and delete all copies.