nfp: fix fw dump handling of absolute rtsym size

Fix bug that causes _absolute_ rtsym sizes of > 8 bytes (as per symbol
table) to result in incorrect space used during a TLV-based debug dump.

Detail: The size calculation stage calculates the correct size (size of
the rtsym address field == 8), while the dump uses the size in the table
to calculate the TLV size to reserve. Symbols with size <= 8 are handled
OK due to aligning sizes to 8, but including any absolute symbol with
listed size > 8 leads to an ENOSPC error during the dump.

Fixes: da762863edd9 ("nfp: fix absolute rtsym handling in debug dump")
Signed-off-by: Carl Heymann <carl.heymann@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_debugdump.c b/drivers/net/ethernet/netronome/nfp/nfp_net_debugdump.c
index e6f19f4..bb8ed46 100644 (file)
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_debugdump.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_debugdump.c
@@ -640,8 +640,8 @@ nfp_dump_single_rtsym(struct nfp_pf *pf, struct nfp_dumpspec_rtsym *spec,
        struct nfp_dump_rtsym *dump_header = dump->p;
        struct nfp_dumpspec_cpp_isl_id cpp_params;
        struct nfp_rtsym_table *rtbl = pf->rtbl;
+       u32 header_size, total_size, sym_size;
        const struct nfp_rtsym *sym;
-       u32 header_size, total_size;
        u32 tl_len, key_len;
        int bytes_read;
        u32 cpp_id;
@@ -657,9 +657,14 @@ nfp_dump_single_rtsym(struct nfp_pf *pf, struct nfp_dumpspec_rtsym *spec,
        if (!sym)
                return nfp_dump_error_tlv(&spec->tl, -ENOENT, dump);
 
+       if (sym->type == NFP_RTSYM_TYPE_ABS)
+               sym_size = sizeof(sym->addr);
+       else
+               sym_size = sym->size;
+
        header_size =
                ALIGN8(offsetof(struct nfp_dump_rtsym, rtsym) + key_len + 1);
-       total_size = header_size + ALIGN8(sym->size);
+       total_size = header_size + ALIGN8(sym_size);
        dest = dump->p + header_size;
 
        err = nfp_add_tlv(be32_to_cpu(spec->tl.type), total_size, dump);
@@ -669,9 +674,9 @@ nfp_dump_single_rtsym(struct nfp_pf *pf, struct nfp_dumpspec_rtsym *spec,
        dump_header->padded_name_length =
                header_size - offsetof(struct nfp_dump_rtsym, rtsym);
        memcpy(dump_header->rtsym, spec->rtsym, key_len + 1);
+       dump_header->cpp.dump_length = cpu_to_be32(sym_size);
 
        if (sym->type == NFP_RTSYM_TYPE_ABS) {
-               dump_header->cpp.dump_length = cpu_to_be32(sizeof(sym->addr));
                *(u64 *)dest = sym->addr;
        } else {
                cpp_params.target = sym->target;
@@ -681,10 +686,9 @@ nfp_dump_single_rtsym(struct nfp_pf *pf, struct nfp_dumpspec_rtsym *spec,
                cpp_id = nfp_get_numeric_cpp_id(&cpp_params);
                dump_header->cpp.cpp_id = cpp_params;
                dump_header->cpp.offset = cpu_to_be32(sym->addr);
-               dump_header->cpp.dump_length = cpu_to_be32(sym->size);
                bytes_read = nfp_cpp_read(pf->cpp, cpp_id, sym->addr, dest,
-                                         sym->size);
-               if (bytes_read != sym->size) {
+                                         sym_size);
+               if (bytes_read != sym_size) {
                        if (bytes_read >= 0)
                                bytes_read = -EIO;
                        dump_header->error = cpu_to_be32(bytes_read);